Module Name:	syssrc
Committed By:	wdk
Date:		Sat Nov 10 07:32:43 UTC 2001

Modified Files:
	syssrc/sys/arch/sgimips/hpc: hpcdma.h sbic.c sbicreg.h sbicvar.h wdsc.c

Log Message:
Complete overhaul of WD33c93 SCSI driver

 - Full support for SCSI-2 Tagged commands (enabled by default)
 - Implement save and restore datapointer messages
 - Formalize interface between MI and MD drivers.
 - decouple interface between MD driver and DMA routines
 - Use scsipi layer where appropriate (Tags, Sync Negotiations etc)
 - control blocks stored using kernel pool(9) functions
 - evcnt(9) compliant counters
 - Enable advanced features on later WD33c93 chips.
   (Identify message out phase is hardware assisted)
 - Improved timeout support (one per active control block)
 - Improved MESG_IN and MESG_OUT handling
 - Start to tidy up debugging output
 - Numerous bug fixes and cleanups throughout

Changes are based largely on the NCR53c9x MI driver for ideas on
how to DTRT.


To generate a diff of this commit:
cvs rdiff -r1.1 -r1.2 syssrc/sys/arch/sgimips/hpc/hpcdma.h \
    syssrc/sys/arch/sgimips/hpc/sbic.c syssrc/sys/arch/sgimips/hpc/sbicreg.h \
    syssrc/sys/arch/sgimips/hpc/sbicvar.h syssrc/sys/arch/sgimips/hpc/wdsc.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.